/**
 ******************************************************************************
 * @file    stm32f10x_crc.c
 * @author  MCD Application Team
 * @version V3.3.0
 * @date    04/16/2010
 * @brief   This file provides all the CRC firmware functions.
 ******************************************************************************
 * @copy
 *
 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
 *
 * <h2><center>&copy; COPYRIGHT 2010 STMicroelectronics</center></h2>
 */

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_crc.h"

/** @addtogroup STM32F10x_StdPeriph_Driver
 * @{
 */

/** @defgroup CRC
 * @brief CRC driver modules
 * @{
 */

/** @defgroup CRC_Private_TypesDefinitions
 * @{
 */

/**
 * @}
 */

/** @defgroup CRC_Private_Defines
 * @{
 */

/* CR register bit mask */

#define CR_RESET_Set    ((uint32_t)0x00000001)

/**
 * @}
 */

/** @defgroup CRC_Private_Macros
 * @{
 */

/**
 * @}
 */

/** @defgroup CRC_Private_Variables
 * @{
 */

/**
 * @}
 */

/** @defgroup CRC_Private_FunctionPrototypes
 * @{
 */

/**
 * @}
 */

/** @defgroup CRC_Private_Functions
 * @{
 */

/**
 * @brief  Resets the CRC Data register (DR).
 * @param  None
 * @retval None
 */
void CRC_ResetDR(void)
{
    /* Reset CRC generator */
    CRC->CR = CR_RESET_Set;
}

/**
 * @brief  Computes the 32-bit CRC of a given data word(32-bit).
 * @param  Data: data word(32-bit) to compute its CRC
 * @retval 32-bit CRC
 */
uint32_t CRC_CalcCRC(uint32_t Data)
{
    CRC->DR = Data;

    return CRC->DR;
}

/**
 * @brief  Computes the 32-bit CRC of a given buffer of data word(32-bit).
 * @param  pBuffer: pointer to the buffer containing the data to be computed
 * @param  BufferLength: length of the buffer to be computed
 * @retval 32-bit CRC
 */
uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
{
    uint32_t index = 0;

    for (index = 0; index < BufferLength; index++)
    {
        CRC->DR = pBuffer[index];
    }
    return CRC->DR;
}

/**
 * @brief  Returns the current CRC value.
 * @param  None
 * @retval 32-bit CRC
 */
uint32_t CRC_GetCRC(void)
{
    return CRC->DR;
}

/**
 * @brief  Stores a 8-bit data in the Independent Data(ID) register.
 * @param  IDValue: 8-bit value to be stored in the ID register
 * @retval None
 */
void CRC_SetIDRegister(uint8_t IDValue)
{
    CRC->IDR = IDValue;
}

/**
 * @brief  Returns the 8-bit data stored in the Independent Data(ID) register
 * @param  None
 * @retval 8-bit value of the ID register
 */
uint8_t CRC_GetIDRegister(void)
{
    return CRC->IDR;
}

/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */

/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/
